Moin,
Our system has detected that this message 550-5.7.1 is likely unsolicited mail. To reduce the amount of spam sent to 550-5.7.1 Gmail, this message has been blocked. Please visit 550-5.7.1 https://support.google.com/mail/?p=UnsolicitedMessageError 550 5.7.1 for more information. j17-20020adfea51000000b002c3e34a0505si5406932wrn.60 - gsmtp
Kann sich da jemand drum kümmern? Habe weder heute noch die nächsten Tage Zeit zu.
Habe leider keinen Zugriff auf den Mail Server, DNS oder ptr-records.
Mit besten Grüßen
Florian Lottes
Habe zumindest die betroffenen nun wieder subscribed.
Allerdings wird auch die Admin-Liste geblocked:
Feb 26 00:01:37 mail postfix/smtp[660198]: 6E9C918842495: to=<xyz5@gmail.com>, relay=gmail-smtp-in.l.google.com[2a00:1450:400c:c0c::1a]:25, delay=2.3, delays=0.58/0.25/0.4/1, dsn=5.7.1, status=bounced (host gmail-smtp-in.l.google.com[2a00:1450:400c:c0c::1a] said: 550-5.7.1 [2a03:4000:47:88::1 19] Our system has detected that this message 550-5.7.1 is likely suspicious due to the very low reputation of the sending 550-5.7.1 domain. To best protect our users from spam, the message has been 550-5.7.1 blocked. Please visit 550 5.7.1 https://support.google.com/mail/answer/188131 for more information. h19-20020a05600c315300b003e205b2adcfsi7398503wmo.111 - gsmtp (in reply to end of DATA command))
Spannenderweise aber nun "low reputation" und nicht direkt Spam.